﻿Five-leaved 
  Clover 
  367 
  

  

  the 
  latter 
  part 
  of 
  the 
  season, 
  and 
  as 
  these 
  organs 
  

   may 
  be 
  developed 
  to 
  very 
  different 
  degrees, 
  

   they 
  afford 
  fine 
  material 
  for 
  the 
  study 
  of 
  the 
  

   law 
  of 
  periodicity. 
  On 
  a 
  garden-cytisus 
  

   (Cytisus 
  candicans 
  attleyanus) 
  I 
  once 
  had 
  the 
  

   good 
  fortune 
  to 
  observe 
  a 
  branch 
  with 
  ascidia, 
  

   which 
  ordinarily 
  are 
  very 
  rare 
  in 
  this 
  species. 
  

   It 
  had 
  produced 
  seven 
  ascidia 
  in 
  all, 
  each 
  

   formed 
  by 
  the 
  conversion 
  of 
  one 
  leaflet 
  on 
  the 
  

   trifoliolate 
  leaves. 
  The 
  first 
  six 
  leaves 
  were 
  

   destitute 
  of 
  this 
  malformation 
  and 
  were 
  quite 
  

   normal. 
  Then 
  followed 
  a 
  group 
  of 
  five 
  leaves, 
  

   constituting 
  the 
  maximum 
  of 
  the 
  period. 
  The 
  

   first 
  bore 
  one 
  small 
  pitcher-like 
  blade, 
  the 
  sec- 
  

   ond 
  and 
  third, 
  each 
  one 
  highly 
  modified 
  organ, 
  

   the 
  fourth, 
  two 
  ascidia, 
  and 
  the 
  last, 
  one 
  leaflet 
  

   with 
  slightly 
  connate 
  margins. 
  The 
  whole 
  

   upper 
  part 
  of 
  the 
  branch 
  was 
  normal, 
  with 
  the 
  

   exception 
  of 
  the 
  seventeenth 
  leaf, 
  which 
  showed 
  

   a 
  slight 
  change 
  in 
  the 
  same 
  direction. 
  All 
  in 
  

   all, 
  the 
  tendency 
  to 
  produce 
  ascidia 
  increased 
  

   from 
  the 
  beginning 
  to 
  the 
  tenth 
  leaf, 
  and 
  de- 
  

   creased 
  from 
  this 
  upward. 
  

  

  The 
  European 
  Venus' 
  looking-glass 
  was 
  ob- 
  

   served 
  in 
  my 
  garden 
  to 
  produce 
  some 
  quater- 
  

   nate 
  and 
  some 
  quinate 
  flowers 
  on 
  the 
  same 
  spec- 
  

   imens. 
  The 
  quinate 
  were 
  placed 
  at 
  the 
  end 
  of 
  

   the 
  branches, 
  those 
  with 
  four 
  petals 
  and 
  sepals 
  

   lower 
  down. 
  The 
  peloric 
  fox-glove 
  shows 
  the 
  

  

  